This title appears in the Scientific Report : 2018 

On the Production of an Isotensor Dibaryon in the $pp \to pp\pi^+\pi^-$ Reaction
Adlarson, P. (Corresponding author)
Augustyniak, W. / Bardan, W. / Bashkanov, M. / Bergmann, F. S. / Berłowski, M. / Bondar, A. / Büscher, M. / Calén, H. / Ciepał, I. / Clement, H. (Corresponding author) / Czerwiński, E. / Demmich, K. / Engels, R. / Erven, A. / Erven, W. / Eyrich, W. / Fedorets, P. / Föhl, K. / Fransson, K. / Goldenbaum, F. / Goswami, A. / Grigoryev, K. / Heijkenskjöld, L. / Hejny, V. / Hüsken, N. / Jarczyk, L. / Johansson, T. / Kamys, B. / Kemmerling, G. / Khoukaz, A. / Khreptak, O. / Kirillov, D. A. / Kistryn, S. / Kleines, H. / Kłos, B. / Krzemień, W. / Kulessa, P. / Kupść, A. / Lalwani, K. / Lersch, D. / Lorentz, B. / Magiera, A. / Marciniewski, P. / Mariański, B. / Morsch, H. --P. / Moskal, P. / Ohm, H. / Parol, W. / del Rio, E. Perez / Piskunov, N. M. / Prasuhn, D. / Pszczel, D. / Pysz, K. / Ritman, J. / Roy, A. / Rudy, Z. / Rundel, O. / Sawant, S. / Schadmand, S. / Schätti--Ozerianska, I. / Sefzick, T. / Serdyuk, V. / Shwartz, B. / Skorodko, T. / Skurzok, M. / Smyrski, J. / Sopov, V. / Stassen, R. / Stepaniak, J. / Stephan, E. / Sterzenbach, G. / Stockhorst, H. / Stroeher, Hans / Szczurek, A. / Trzciński, A. / Wolke, M. / Wrońska, A. / Wüstner, P. / Yamamoto, A. / Zabierowski, J. / Zieliński, M. J. / Żuprański, P. / Żurek, M.
Zentralinstitut für Elektronik; ZEA-2
IKP- Technische und Administrative Infrastruktur; IKP-TA
Kernphysikalische Großgeräte; IKP-4
Experimentelle Hadrondynamik; IKP-2
Experimentelle Hadronstruktur; IKP-1
2018
Preprint
Cosmic Matter in the Laboratory
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OpenAccess
Please use the identifier: http://hdl.handle.net/2128/19892 in citations.
Exclusive measurements of the quasi-free $pp \to pp\pi^+\pi^-$ reaction have been performed by means of $pd$ collisions at $T_p$ = 1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region $T_p = 1.08 - 1.36$ GeV ($\sqrt s$ = 2.35 - 2.46 GeV), which includes the regions of $N^*(1440)$ and $\Delta(1232)\Delta(1232)$ resonance excitations. Calculations describing these excitations by $t$-channel meson exchange are at variance with experimental differential cross sections and underpredict substantially the measured total cross section. An isotensor $\Delta N$ dibaryon resonance with $I(J^P) = 2(1^+)$ produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong and more recently calculated by Gal and Garcilazo.